Use {{location|RS}}
to tag expeditions that took place in Serbia. It will add Category:Meetup in Serbia to the expedition.
Using ISO 3166-2 abbreviations, you may also tag the okrug that the expedition took place in.
If the category link appears red, do not worry and create the category. Make sure that it is included in the appropriate parent category, for instance, Category:Meetup in Zlatiborski okrug is a subcategory of Category:Meetup in Serbia. The subcategories should be sorted in by their respective code.
Examples
{{location|RS}}
: Serbia{{location|RS|16}}
: Zlatiborski okrug